EP0221681A1 - Clamping means for a strap - Google Patents

Clamping means for a strap Download PDF

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Publication number
EP0221681A1
EP0221681A1 EP86307698A EP86307698A EP0221681A1 EP 0221681 A1 EP0221681 A1 EP 0221681A1 EP 86307698 A EP86307698 A EP 86307698A EP 86307698 A EP86307698 A EP 86307698A EP 0221681 A1 EP0221681 A1 EP 0221681A1
Authority
EP
European Patent Office
Prior art keywords
strap
guide member
reaction
pivot axis
angular movement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP86307698A
Other languages
German (de)
English (en)
French (fr)
Inventor
Douglas James Cunningham
David Alan Mckernon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Autoliv AB
Original Assignee
Britax Wingard Ltd
Electrolux Autoliv AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Britax Wingard Ltd, Electrolux Autoliv AB filed Critical Britax Wingard Ltd
Publication of EP0221681A1 publication Critical patent/EP0221681A1/en
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/34—Belt retractors, e.g. reels
    • B60R22/36—Belt retractors, e.g. reels self-locking in an emergency
    • B60R22/42—Belt retractors, e.g. reels self-locking in an emergency having means for acting directly upon the belt, e.g. by clamping or friction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R22/00—Safety belts or body harnesses in vehicles
    • B60R22/18—Anchoring devices
    • B60R22/185—Anchoring devices with stopping means for acting directly upon the belt in an emergency, e.g. by clamping or friction
    • B60R22/1855—Anchoring devices with stopping means for acting directly upon the belt in an emergency, e.g. by clamping or friction the means being sensitive to belt tension
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/21—Strap tighteners
    • Y10T24/2175—Cargo tie down
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/40—Buckles
    • Y10T24/4002—Harness
    • Y10T24/4012—Clamping
    • Y10T24/4016—Pivoted part or lever
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/40—Buckles
    • Y10T24/4072—Pivoted lever

Definitions

  • This invention relates to clamping means for a strap and has particular application to the provision of clamping means for a vehicle safety belt system incorporating an emergency locking retractor.
  • Locking mechanisms for safety belt retractors commonly operate to lock the spindle of the retractor. With this arrangement, it is usual to find that an undesirably large length of strap is paid out after the spindle has locked, due to tightening of the coils of strap wound on the spindle. In addition, it is necessary for the retractor to be strong enough to take the maximum load which might be imposed on the strap during an accident.
  • Patent Specification EP-A-0147059 discloses clamping means for a strap which is adapted to be located between a strap storage location and a strap utilisation location and which comprises a reaction member secured to a first support member which is pivotally mounted on a base member for angular movement about a first axis, a guide member secured to a second support member which is mounted for angular movement about a second axis, retention means for retaining the guide member and the reaction member in respective rest positions in which the strap is freely movable between the guide member and reaction member until the tension applied to the strap exceeds a predetermined level, the reaction member and the guide member being so interconnected that, when the tension in the strap exceeds said predetermined level, angular movement of the guide member causes corresponding angular movement of the reaction member, thereby wrapping the strap round both the reaction member and the guide member so that one layer of the strap is clamped against the reaction member by another layer of the strap.
  • the present invention aims to provide clamping means of this type in which the extent to which the strap is wrapped round the reaction member and the guide member is increased, thereby reducing extent to which an imposed load can cause the strap to slip through the clamping means.
  • the second support member is pivotally mounted on the first support member with the second pivot axis positioned between the reaction member and the first pivot axis, the distance of the guide member from the second pivot axis is greater than the distance of the reaction member from the second pivot axis, and said rest position of the guide member is on the opposite side of the first support member to both the strap storage location and the strap utilisation location and is defined by stop means which prevent movement of the guide member therefrom towards the first pivot axis, so that the resultant force exerted on the guide member by tension in the strap is directed between the first and second pivot axes when the guide member and support member are both in their rest positions and tension in the strap exceeding said predetermined level causes angular movement of the first support member to an orientation in which said resultant force is directed on the opposite side of the second pivot axis to the first pivot axis.
  • the retention means may comprise resilient means arranged to bias the first support member into its rest position.
  • the second support member is also resiliently biased into its rest position, thereby ensuring that both support members return to their rest positions when tension in the strap is reduced sufficiently.
  • Figure 1 shows the B-post 10 of a motor vehicle having a conventional shoulder anchorage 12 through which the shoulder strap 14 of a safety belt passes on its way to an emergency locking retractor 16 having a base member 18 which is mounted on the B-post 10 adjacent to the bottom thereof.
  • a pair of side limbs 20 and 22 project from the base member 18 below the retractor 16.
  • Each side limb 20, 22 has a respective support arm 24, 26 pivotally mounted thereon for angular movement about a generally horizontal axis defined by respective pivot pins 28 and 30.
  • the free ends of the arms 24 and 26 are interconnected by a reaction member 32.
  • a second pair of support arms 34 and 36 are pivotally mounted, by respective coaxial pivot pins 38 and 40 on the support arms 24 and 26 respectively at intermediate positions between the first mentioned pivot axis and the reaction member 32.
  • a guide member 42 is mounted on the free ends of the support arms 34 and 36 which are of sufficient length to allow the guide member 42 to pivot round the end of the first support arms 24 and 26.
  • the strap 14 passes round the guide member 42 between the shoulder anchorage 12 and the retractor 16.
  • a spring 44 biases the guide member 42 in the anti-clockwise direction as viewed in Figure 1, into the position illustrated, so that respective heels 46 and 48 on the levers 24 and 26 engage with the base member and the guide member 42 engages with semicircular edges 50 and 52 of the side limbs 20 and 22.
  • the strap 14 passes down from the shoulder anchorage 12, between the B-post 10 and the guide member 42, round the bottom of the guide member 42 and thence between the guide member 42 and the reaction member 32 to the retractor 16.
  • the heels 46 and 48 and the semicircular edges 50 and 52 are positioned so that the strap 14 does not touch the reaction member 32 at this stage.
  • the strength of the spring 44 is such that normal tension in the strap 14 as it is withdrawn from the retractor 16 is insufficient to cause angular movement of the first support arms 14 and 26 in the clockwise direction.
  • any tension in the strap 14 sufficient to overcome the spring 44 will cause the first support levers 24 and 26 to pivot in the clockwise direction, the guide member 42 initially remaining in contact with the edges 50 and 52. If the tension is sufficient, the arms 24 and 26 move to the position illustrated in Figure 4 in which the resultant of the forces exerted by the two ends of the strap 14 on the guide member 42 intersects the pivot axis defined by the pins 38 and 40.
  • any further movement of the arms 24 and 26 causes the arms 34 and 36 to go over-centre to the position illustrated in Figure 5 in which the two parts of the strap 14 on each side of the guide member 42 are in face-to-face engagement with each other where they are wrapped round the reaction member 32, the outer layer clamping the inner layer against the reaction member 32. Further tension in the strap 14 is thus not passed to the retractor 16, thereby minimising the length of strap paid out as a result of bunching on the spool of the retractor 16.
  • the clamping means may be incorporated into the shoulder anchorage 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buckles (AREA)
  • Clamps And Clips (AREA)
  • Automotive Seat Belt Assembly (AREA)
EP86307698A 1985-10-09 1986-10-06 Clamping means for a strap Ceased EP0221681A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858524916A GB8524916D0 (en) 1985-10-09 1985-10-09 Clamping means for strap
GB8524916 1985-10-09

Publications (1)

Publication Number Publication Date
EP0221681A1 true EP0221681A1 (en) 1987-05-13

Family

ID=10586423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86307698A Ceased EP0221681A1 (en) 1985-10-09 1986-10-06 Clamping means for a strap

Country Status (8)

Country Link
US (1) US4718148A (ko)
EP (1) EP0221681A1 (ko)
JP (1) JPS62116338A (ko)
KR (1) KR870003900A (ko)
AU (1) AU584243B2 (ko)
BR (1) BR8604905A (ko)
GB (1) GB8524916D0 (ko)
ZA (1) ZA867704B (ko)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4876770A (en) * 1988-10-03 1989-10-31 Indiana Mills & Manufacturing, Inc. Anti-creep cam bar
US5004178A (en) * 1988-10-17 1991-04-02 Jidosha Denki Kogyo K.K. Seat belt apparatus
JPH0325053A (ja) * 1989-06-23 1991-02-01 Takata Kk プリテンショナー装置
JPH04103453A (ja) * 1990-08-24 1992-04-06 Takata Kk バネ式プリテンショナーのトリガー
US5316339A (en) * 1991-05-31 1994-05-31 Pacific Scientific Company Safety belt gripping mechanism
US5350195A (en) * 1993-01-28 1994-09-27 Trw Vehicle Safety Systems Inc. Device for clamping seat belt webbing
US5533717A (en) * 1994-07-05 1996-07-09 Del Raso; Americo Adjustable clamping strap
US6260884B1 (en) * 1999-03-05 2001-07-17 Indiana Mills & Manufacturing, Inc. D-loop web belt gripper
US7740553B2 (en) * 2005-05-06 2010-06-22 Pitney Bowes Inc. Detachable feed tray with self adjusting side guides
CN102371966B (zh) * 2010-08-27 2015-03-25 孙寅贵 一种安全、舒适、方便使用的汽车安全带的装置及方法
US9821760B2 (en) * 2013-04-17 2017-11-21 Yingui Sun Locking device, vehicle seat belt adjusting device, and vehicle seat belt

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097178A (en) * 1964-07-03 1967-12-29 Volvo Ab Improvements in or relating to mechanism for safety belts
EP0061825A2 (en) * 1981-02-14 1982-10-06 Britax (Wingard) Limited Clamping means for a strap
EP0147059A2 (en) * 1983-11-30 1985-07-03 Electrolux Autoliv AB Clamping means for a strap

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473581A (en) * 1923-11-06 Leveb beiit buckle
US2554542A (en) * 1950-04-03 1951-05-29 Ry Lock Company Ltd Locator and wear shoe for frameless window screens
US3227489A (en) * 1963-08-21 1966-01-04 Robert A Stubblefield Retractable seat belt
US3574246A (en) * 1969-02-11 1971-04-13 Roy Norton Buckle for cargo-holding straps
DE2047706C3 (de) * 1970-09-28 1979-01-25 Wolf-Dieter 7071 Lindach Klink Sicherheitsgurt für Insassen von Kraftfahrzeugen
GB1526217A (en) * 1975-10-29 1978-09-27 Richmond R Clamping devices
US4464811A (en) * 1982-09-16 1984-08-14 Aeroquip Corporation Over center strap buckle
US4549770A (en) * 1984-08-06 1985-10-29 General Motors Corporation Belt clamping guide loop

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1097178A (en) * 1964-07-03 1967-12-29 Volvo Ab Improvements in or relating to mechanism for safety belts
EP0061825A2 (en) * 1981-02-14 1982-10-06 Britax (Wingard) Limited Clamping means for a strap
EP0147059A2 (en) * 1983-11-30 1985-07-03 Electrolux Autoliv AB Clamping means for a strap

Also Published As

Publication number Publication date
ZA867704B (en) 1987-06-24
JPS62116338A (ja) 1987-05-27
KR870003900A (ko) 1987-05-06
GB8524916D0 (en) 1985-11-13
BR8604905A (pt) 1987-07-07
AU6359286A (en) 1987-04-16
AU584243B2 (en) 1989-05-18
US4718148A (en) 1988-01-12

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB

17P Request for examination filed

Effective date: 19870911

17Q First examination report despatched

Effective date: 19890310

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ELECTROLUX AUTOLIV AB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED

18R Application refused

Effective date: 19891024

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CUNNINGHAM, DOUGLAS JAMES

Inventor name: MCKERNON, DAVID ALAN